NO ECM feed after voltage transformer exchange!?
Thread Starter
Newbie
Joined: Jul 2019
Posts: 9
Likes: 8
06 S600, 03 S600
NO ECM feed after voltage transformer exchange!?
Hi guys, hoping for a little bit of help.
I was messing around with my 220 600TT and at least from the looks of things, I think I might have killed the ECM somehow by swapping it to another car!?
It ran fine, I switched it off, I went to restart, after removing the voltage transformer to another vehicle for test purposes and was met by cooling fan on default mode.
I was convinced it was a fuse or a relay, but I've checked every fusible link and relay on this car at least twice, all seems to be working
Defo getting ezs and start authorisation, just no crank and the fans spinning
Xentry codes don't point to anything other than a loss of ECM Comms on the bus network and no Comms with the ECU
Any ideas before I commit to an ECU replacement?
I was messing around with my 220 600TT and at least from the looks of things, I think I might have killed the ECM somehow by swapping it to another car!?
It ran fine, I switched it off, I went to restart, after removing the voltage transformer to another vehicle for test purposes and was met by cooling fan on default mode.
I was convinced it was a fuse or a relay, but I've checked every fusible link and relay on this car at least twice, all seems to be working
Defo getting ezs and start authorisation, just no crank and the fans spinning
Xentry codes don't point to anything other than a loss of ECM Comms on the bus network and no Comms with the ECU
Any ideas before I commit to an ECU replacement?
Super Member
Joined: May 2019
Posts: 671
Likes: 288
From: Omaha, NE
2007 S600
Your post is a little confusing. What exactly did you swap to a different car? The ECU, or the VT? And did you exchange (swap a part from A to B, and B to A)? Have you tried putting all the original parts back where they came from?
I'd be checking all the connectors again, and by "checking" I mean removing, inspecting, and re-seating. Bent pins, debris, etc. can cause all kind of issues with power and communication in a system like this.
I'd be checking all the connectors again, and by "checking" I mean removing, inspecting, and re-seating. Bent pins, debris, etc. can cause all kind of issues with power and communication in a system like this.
Thread Starter
Newbie
Joined: Jul 2019
Posts: 9
Likes: 8
06 S600, 03 S600
Your post is a little confusing. What exactly did you swap to a different car? The ECU, or the VT? And did you exchange (swap a part from A to B, and B to A)? Have you tried putting all the original parts back where they came from?
I'd be checking all the connectors again, and by "checking" I mean removing, inspecting, and re-seating. Bent pins, debris, etc. can cause all kind of issues with power and communication in a system like this.
I'd be checking all the connectors again, and by "checking" I mean removing, inspecting, and re-seating. Bent pins, debris, etc. can cause all kind of issues with power and communication in a system like this.
I moved the voltage transformer from the 220 that had just ran onto my 221. When I put the voltage transformer back into the 220, went to start it and I had nothing but fans.
Putting the original parts back shouldn't/wouldn't make a difference. It should at least read the ECM and crank even with the VT disconnected.
The ECU and it's plugs hadn't been touched prior to it failing.
It's hard to see it being related to the voltage transformer, but I know the car ran literally perfectly 20 seconds prior to doing the voltage transformer swap, and now it very much seems like a ECU failure.
I'm going to get all the feeds and earth's up and probe at the ECM this weekend to make sure above sure it's getting it's correct feeds and earth's at the ECU end not just at the fuses.
Otherwise, I think I haven't got much choice but to try an ECU
